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I just took over our companies online cart. I have a backgournd in web development and some experience with seo. Recently my online catalog (that had been online for the past 4 years) was updated by the developers Dec. 5. Without my knowlege, they changed every page name from the dynamic string to a text string reflecting the content of the page. They didn't even use hyphens between the words. The PR on all of the pages (around 200-300 pages) is no longer visible. They used 301 redirects to the new page names. The content has not changed.

My question:

How will this effect the traffic flow to my site? Will the change be helpful or harmful? Should I have them change all pages back to their orginal name or leave it the way it is?

Most Importantly ... will this effect our status in the SERPs???

Also, what is the deal between using .htm vs. .html. I know that the 3 character extension was more compatible in the past. Does it matter anymore?

I just took over our companies online cart. I have a backgournd in web development and some experience with seo. Recently my online catalog (that had been online for the past 4 years) was updated by the developers Dec. 5. Without my knowlege, they changed every page name from the dynamic string to a text string reflecting the content of the page. They didn't even use hyphens between the words. The PR on all of the pages (around 200-300 pages) is no longer visible. They used 301 redirects to the new page names. The content has not changed.

My question:

How will this effect the traffic flow to my site? Will the change be helpful or harmful? Should I have them change all pages back to their orginal name or leave it the way it is?

Also, what is the deal between using .htm vs. .html. I know that the 3 character extension was more compatible in the past. Does it matter anymore?